Improvement in apparatus for lowering pipes in wells



S. P. OKERLUND.

Apparatus for Lowering Pipes in Wells.

Patented July 29,1873

mtzze & 6 es,

JMMAW,

UNITED STATES PATENT OFFICE.

S'VEND P. OKERLUND, OF OMAHA, NEBRASKA.

IMPROVEMENT IN APPARATUS FOR LOWERING PIPES IN WELLS.

Specification forming part of Letters Patent No. 141,233, dated July 29, 1873; application filed October 3, 1872.

To all whom it may concern:

Be it known that I, of Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Apparatus for Lowering Pipe in Wells; and that the following is a full, clear, and exact specification thereof, which will enable others skilled in the art to make and use the said invention.

My invention relates to an improved apparatus for lowering down tubes of brick, terracotta, or stoneware, to form a casin g for bored wells of moderate diameter; and it consists of a tube-frame, composed of a head-block having three or more arm's pivoted thereto, and held out by springs; said arms having shoulders on them to support the tube during its descent into the well, and also having their lower ends sloped off and provided with hooks for the support of an encircling ring, by means of which the arms may be drawn from under the tube while in the well, so as to allow of the withdrawal of the tube-frame after the welltnbe is placed in its proper position. Said invention also consists in the combination, with the tube-frame just described, of a thintubebox, of an exterior diameter less than the diameter of the well, and an interior diameter greater than the diameter of the well-tube; said tube-box being placed over the well-tube while on the tube-frame, and being secured to the tube-frame, so as to protect the well-tube during its descent, and to be drawn out with the tube-frame after the well-tube is placed in position.

In the accompanying drawing, A A are the sides of the well; B, the tube or cylinder, of brick, terra-cotta, earthenware, or iron, to be lowered into position; 0, the point or socket piece into which the arms or bars D are hinged or jointed. E are the shoulders which support tube or cylinder B, and slant inward toward ring G, which prevents the springs F from forcing the lower ends of the arms D too far apart. The ring G is supported on hooks H. I is a cylindrical box, which surrounds the apparatus and cylinder to be lowered, and protects the latter from contact with the sides SVEND P. OKERLUND,

A of the well in its descent. K is a shoulder to support the box; and L, a pin.

The operation is as follows: A fiat ring is first set on the mechanism, resting on the shoulders E. On this ring is then built the brick tube or cylinder desired to be inserted into the well; or, if a solid tube is desired to be lowered,'it is placed thereon and completely incloses the apparatus. After this has been accomplished, cords or wires are attached-to the ring G, and passed up through the surrounding tube or cylinder. The box I is then placed over the whole, and is supported by shoulder K. This box should only descend until its lower edge is even with the lower Edge of the tube B, when the latter is in position to be lowered, though in the drawing it descends below. The whole apparatus is then lowered into the well by a rope or chainand a crane and Windlass or other suitable device, and when it reaches the point at which the tube B is to be deposited, the cord which has been attached to ring Gr, so as to elevate it I equally on all sides at once, is pulled from the top of the well. The ring G is thus raised, and, sliding up the outward slants or shoulders E, forces the shoulders from beneath tube or cylinder B, which is released, and slides down onto its permanent foundation beneath. The whole apparatus is then drawn up out of the well through the interior of the tube, leaving it in its place on the bottom. The next tube is inserted in a similar way.

The shoulders E may be forced in from under succeeding tubes by coming in contact on their slanted edges with tubes alreadylowcred, and being forced in this way from under the tube they are supporting. The springs F may be spirals, or of any other desired form. The cylindrical box I, which I use to protect the tube while being laid, I prefer to make of sheet-iron, though it may be made of any other suitable material. The arms or bars D are made, preferably, of iron or steel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The tube-frame O D D G, consisting of protect the well-tube during its descent, and. to be drawn up with the tube-frame when raised, substantially as specified.

As evidence of the foregoing ,witness my hand. this 29th day of August, A. D. 1872.

SVEND P. OKERLUND.

Witnesses B. P. KNIGHT, LEWIS S. REED. 

